@ystokes
Slaves would build their own housing at very little cost to the owner and then be crammed into it unlike a free man that would have to pay someone rent, they would grow most of their own food or get scraps from the owner's leftovers that don't cost the owner much, as for medical care that would most likely be done by another slave.
Sure, if you want to see your large investment die.
Might as well claim that a poultry farmer would not build coops, and feed and care for their chickens. Or build a single coop and cram all of the birds into that.
To put it bluntly, slaves were valuable property in the antebellum South. Typical prices were around $1,500 each, over $40,000 today. The break-even point was typically 5 years, that means if your slaves died before you had them 6 years, you actually lost money.
They did build their own housing, but from supplies provided by the owners. And they were normally sound quarters, as to keep them healthy and able to work.
And scraps, really? No, they got items that still live on today in "Black Culture" to this day. Grits, chitterlings, pork back, collard greens, hominy, ribs, catfish, cornbread, sausage grave & biscuits, etc.
And the same with medical care. Just as most whites used "home treatments", so did the slaves. In fact, the average life expectancy of whites in the 1860's was 40. For slaves, 37. Which clearly shows that their wellbeing and care was only slightly worse than the rest of the population.
You really should research what slave conditions were like in the era, you might learn something. On most plantations, it was not really unlike say military housing. Dorm type facilities for single men and women, and small 1 room cabins for couples. Not unlike how most whites lived in that era.
And most slaves were allowed gardens, and their own livestock. Many even had firearms for hunting, and the use of snares and fishing was also common (and even encouraged).